<template>
  <div class="app-container">
      <el-form label-width="120px">
        <el-form-item label="讲师名称">
          <el-input v-model="teacher.name"/>
        </el-form-item>
        <el-form-item label="讲师排序">
          <el-input-number v-model="teacher.sort" controls-position="right" :min="0"/>
        </el-form-item>
        <el-form-item label="讲师头衔">
          <el-select v-model="teacher.level" clearable placeholder="请选择">
            <el-option :value="1" label="高级讲师"/>
            <el-option :value="2" label="首席讲师"/>
          </el-select>
        </el-form-item>
        <el-form-item label="讲师资历">
          <el-input v-model="teacher.career"/>
        </el-form-item>
        <el-form-item label="讲师简介">
          <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
        </el-form-item>

        <!-- 讲师头像：TODO -->
        <!-- 讲师头像 -->
        <el-form-item label="讲师头像">

            <!-- 头衔缩略图 -->
            <pan-thumb :image="teacher.avatar"/>
            <!-- 文件上传按钮 -->
            <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
            </el-button>

            <!--
        v-show：是否显示上传组件
        :key：类似于id，如果一个页面多个图片上传控件，可以做区分
        :url：后台上传的url地址
        @close：关闭上传组件
        @crop-upload-success：上传成功后的回调 -->
            <image-cropper
                          v-show="imagecropperShow"
                          :width="300"
                          :height="300"
                          :key="imagecropperKey"
                          :url="BASE_API+'/eduOss/fileOss'"
                          field="file"
                          @close="close"
                          @crop-upload-success="cropSuccess"/>

        </el-form-item>

        <el-form-item>
          <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
        </el-form-item>
    </el-form>
  </div>
</template>
<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
  components: { ImageCropper, PanThumb },
  data(){
    return{
      teacher:{
        name: '',
        sort: 0,
        level: 1,
        career: '',
        intro: '',
        avatar: ''
      },
      saveBtnDisabled:false,  // 保存按钮是否禁用,
      BASE_API: process.env.BASE_API, // 接口API地址
      imagecropperShow: false, // 是否显示上传组件
      imagecropperKey: 0 // 上传组件id
    }
    
  },
  created(){
    this.init()
  },
  watch: {//监听
    $route(to, from){
      this.init()
    }
  },
  methods:{
    init() {
        //判断路径有id值,做修改
        if(this.$route.params && this.$route.params.id) {
            //从路径获取id值
            const id = this.$route.params.id
            //调用根据id查询的方法
            this.findById(id)
        } else { //路径没有id值，做添加
          //清空表单
          this.teacher = {}
        }
    },
    close(){//关闭上传弹框的方法
        this.imagecropperShow=false
        //上传组件初始化
        this.imagecropperKey = this.imagecropperKey+1
    },
    cropSuccess(data){//上传成功
      this.imagecropperShow=false
      //上传之后接口返回图片地址
      this.teacher.avatar = data.url
      this.imagecropperKey = this.imagecropperKey+1
    },
    findById(id){
      teacherApi.findById(id)
        .then(response =>{
          this.teacher = response.data.teacher
        })
    },
    saveOrUpdate() {
      //判断修改还是添加
      //根据teacher是否有id
      if(!this.teacher.id) {
        //添加
        this.saveTeacher()
      } else {
        //修改
        this.updateTeacher()
      }
    },
     //添加讲师的方法
    saveTeacher() {
      teacherApi.addTeacher(this.teacher)
        .then(response => {//添加成功
          //提示信息
          this.$message({
              type: 'success',
              message: '添加成功!'
          });
          //回到列表页面 路由跳转
          this.$router.push({path:'/edu/teacher/list'})
        })
    },
    //修改讲师
    updateTeacher(){
      teacherApi.updateTeacher(this.teacher)
        .then(response =>{//修改成功
          //提示信息
          this.$message({
              type: 'success',
              message: '添加成功!'
          });
          //回到列表页面 路由跳转
          this.$router.push({path:'/edu/teacher/list'})
        })
    }
  
  }
}
</script>